Hyundai Repair: parking lights stay on after the car is shut off, right turn signals, control lamps

Question
2003 Tiburon 2.7L GT coupe
The parking lights stay on after the car is shut off.   Sometimes they may go off, only to come back on while the car is sitting.  Only way to keep the battery from dying is to disconnect the negative terminal.   Also, the high beams will turn on when u pull back on the switch (flash), but will not stay on when the switch is full forward (ON).  I have changed a relay on the BCM, one that I was told that operates the turn signals/parking lights, but it didnt fix the problem.  The relay I changed was soldered to the BCM board, not a pullout.   If it may be another of those 3 relays that are on the board, I am adept at soldering and can change them without buying a new BCM.  Any help would be GREATLY appreciated.

Answer
Hi, Jim.  Let me say you're a better man than me.  I don't think I'd be able to solder something into a circuit board that small.

As far as I can tell from the schematics (and keep in mind that the information they show me regarding the inside of the BCM is limited), the three relays control lamps as follows:
-- one for left turn signals
-- one for right turn signals
-- one for tail/park lamps.

So it is indeed possible that you've replaced the wrong relay.  I'd suggest the following to attempt to locate the proper relay:
-- If possible, remove the cover to the BCM and reinstall it, making sure to not touch the metal of the car to the circuit board.
-- Operate the left and right turn signals and feel the relays.  You should be able to feel them clicking on/off as the turn signals turn on/off.  
-- The relay not clicking on/off is probably the one that operates the tail lamps.


You might also try to feel the relay for the tail lamps click on/off by feeling it as you turn the tail lamps on/off.  If it's stuck on, I'd expect you won't feel the same clicking as the other relays; in fact, I'd expect you'd feel almost nothing.


In regard to your high beams, check to be sure it's the high beams that come on in flash mode-- the system is designed to illuminate both high and low beams in this position.  If the high beams indeed come on, the problem is without question in the switch.  If it's only the low beams that come on, you may have a blown high beam fuse or a defective high beam relay.